linux-kernel - Re: [PATCH 4/5] watchdog: control hard lockup detection default

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Message-ID: <20140818091644.GE25495@gmail.com>
Date:	Mon, 18 Aug 2014 11:16:44 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Don Zickus <dzickus@...hat.com>
Cc:	akpm@...ux-foundation.org, kvm@...r.kernel.org,
	pbonzini@...hat.com, mingo@...hat.com,
	LKML <linux-kernel@...r.kernel.org>,
	Ulrich Obergfell <uobergfe@...hat.com>,
	Andrew Jones <drjones@...hat.com>
Subject: Re: [PATCH 4/5] watchdog: control hard lockup detection default


* Don Zickus <dzickus@...hat.com> wrote:

> The running kernel still has the ability to enable/disable at any
> time with /proc/sys/kernel/nmi_watchdog us usual. However even
> when the default has been overridden /proc/sys/kernel/nmi_watchdog
> will initially show '1'. To truly turn it on one must disable/enable
> it, i.e.
>   echo 0 > /proc/sys/kernel/nmi_watchdog
>   echo 1 > /proc/sys/kernel/nmi_watchdog

This looks like a bug, why is this so?

Thanks,

	Ingo
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